Originally Posted by
Road Fan
No. I think TMar is pretty much on the button regarding identifying the frame itself, based on my older Mondonico and my recollection of the literature. I'm certainly not a Columbus expert.
I wonder if it's a repaint? The decals seem odd.
Here's a link that shows SLX and SPX were thicker with the helical ridges for professional cyclists and "SUPER BUTTED" It was heavier with SPX being for larger frames.
The Bicycle Info Project :: Columbus tubing chart